I'm a little surprised to see this article. I just finished a free three-day trial of AirVPN last night.
I've been testing out multiple VPNs over the past year, and I've gone from TorGuard to Private Internet Access, to IPVanish. All three of those were "Meh" in terms of the quality of their services.
Then I tried AirVPN, and no pun intended, I was blown away. It had a proper client, lots and lots of transparency, stability, and best of all, speed.
The other VPNs have been pretty inconsistent speed wise. IPVanish in particular was a bit odd. I did a speed test, and the speeds appeared amazing. However, in practice, I got much less than that on downloads. It could have been coincidence, considering how much that service lost connection, but it still seems a little shady.
All in all though, I'm going to be purchasing a quarterly subscription to AirVPN later today.